[Kurt in NJ]

I have gotten compression back on engines that have been sitting and had debris on the valves causing low compression be using a air hose blowing air into the cylinder and cranking, I used the hose adapter that is used to put shop air into cylinder - then crank with starter----- this assumes that engine was put together correctly

Possibly the cam timing is off, look at valve position, when ex is just about closed, and intake is just starting to open the piston should be at top center--- easier done if car can be rolled in top gear